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利用真空四球摩擦试验机系统考察了全氟聚醚(Z25)和甲基氟氯苯基硅油(FCPSO)两种空间润滑油在空气、真空和高纯氮气气氛中的摩擦磨损性能,采用扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)分别分析了磨损表面的微观形貌及典型元素的化学状态。结果表明:Z25在3种气氛中均表现出低摩擦高磨损的特性,且真空中摩擦系数最低,这主要是由于Z25对摩擦副具有润滑和腐蚀的双重作用;FCPSO在3种气氛中均表现出高摩擦低磨损的特性,且真空中磨斑直径最小,这主要是由于FCPSO在摩擦副表面形成了FeCl2边界保护膜.
The friction and wear properties of two space lubricating oils, perfluorinated polyether (Z25) and methyl chlorofluorophenyl phenyl silicone oil (FCPSO), were investigated in a vacuum four-ball tribometer with air, vacuum and high purity nitrogen atmosphere. The microstructure of the worn surface and the chemical state of typical elements were analyzed by SEM and XPS respectively. The results show that Z25 exhibits the characteristics of low friction and high wear in all three kinds of atmospheres and the lowest friction coefficient in vacuum, which is mainly due to the double action of lubrication and corrosion of Z25 on the friction pairs. The FCPSO shows in all three atmospheres High friction and low wear characteristics, and the minimum diameter of the scar in vacuum, which is mainly due to the formation of a FeCl2 border protective film on the surface of the friction pair.